JK Audio RemoteAmp Blue User manual

RemoteAmp
Headphone / Earpiece Amplifier
Users Guide
JK Audio Inc.

Description
Input
The input XLR accepts signals from your mixer, distribution
amplifier or phone line hybrid. The balanced input XLR is
wired: Pin1 ground
Pin2 Signal+
Pin3 Signal-
This is a transformer balanced input. If you are using an
unbalancedsource,youmustconnectyoursignalleadtopin2
andthenconnectyourgroundtopins1and3.
Output
The 1/8" earpiece jack is current limited to prevent excessive
signals into your earpiece. This mono jack will power
earpieces with an impedance of 150 ohms or greater. If you
would like to use light-weight stereo consumer headphones
that are typically 8 to 36 ohms, wired with a 1/8" stereo jack,
you will need to use an adapter to plug into the 1/4" stereo
headphone Jack. Or you can solder a jumper wire across the
topofthe150ohmresistor,R2.
The 1/4" headphone jack is wired for either a stereo or mono
plug. If a stereo headphone plug is used, you will hear signal
in both the left and right ears.
A 1/4" mono plug can also be used without any problem,
however,ifyouplantoalwaysusea1/4"monoplug,youmight
considerasimplemodificationtotheRemoteAmp.
Resistor R3 provides signal to the "ring" of tip-ring-sleeve.
23
If you clip one of the leads on R3, you will disable stereo
operation and increase the power available to the left or mono
output. Another common solution is to wire your headphones
with a stereo headphone plug but wire both ears to the left
channel (the tip of the plug) and leave the ring unconnected.
This has the same effect as clipping the resistor on
RemoteAmp.
GainAdjustment
BehindthebackcoveroftheRemoteAmpyouwillfindajumper
on the circuit board which allows you to adjust the maximum
amountof gainthe RemoteAmpdelivers. In thefactory default
open position you will receive a maximum of 25 dB gain. If the
jumper is set to the optional closed position, a maximum of 40
dBgainwillbedelivered.
Battery
An alkaline battery is strongly recommended. The battery test
indicator shows the strength of the battery power remaining. A
bright light indicates plenty of power, a dim light reminds you to
be prepared with a fresh battery. Once the LED stops
responding to the test switch, you will begin to hear signal
breakup and distortion as the battery is drained of its last
breath which may mean minutes or hours depending on the
circumstances.

Description
Input
The input XLR accepts signals from your mixer, distribution
amplifier or phone line hybrid. The balanced input XLR is
wired: Pin1 ground
Pin2 Signal+
Pin3 Signal-
This is a transformer balanced input. If you are using an
unbalancedsource,youmustconnectyoursignalleadtopin2
andthenconnectyourgroundtopins1and3.
Output
The 1/8" earpiece jack is current limited to prevent excessive
signals into your earpiece. This mono jack will power
earpieces with an impedance of 150 ohms or greater. If you
would like to use light-weight stereo consumer headphones
that are typically 8 to 36 ohms, wired with a 1/8" stereo jack,
you will need to use an adapter to plug into the 1/4" stereo
headphone Jack. Or you can solder a jumper wire across the
topofthe150ohmresistor,R2.
The 1/4" headphone jack is wired for either a stereo or mono
plug. If a stereo headphone plug is used, you will hear signal
in both the left and right ears.
A 1/4" mono plug can also be used without any problem,
however,ifyouplantoalwaysusea1/4"monoplug,youmight
considerasimplemodificationtotheRemoteAmp.
Resistor R3 provides signal to the "ring" of tip-ring-sleeve.
23
If you clip one of the leads on R3, you will disable stereo
operation and increase the power available to the left or mono
output. Another common solution is to wire your headphones
with a stereo headphone plug but wire both ears to the left
channel (the tip of the plug) and leave the ring unconnected.
This has the same effect as clipping the resistor on
RemoteAmp.
GainAdjustment
BehindthebackcoveroftheRemoteAmpyouwillfindajumper
on the circuit board which allows you to adjust the maximum
amountof gainthe RemoteAmpdelivers. In thefactory default
open position you will receive a maximum of 25 dB gain. If the
jumper is set to the optional closed position, a maximum of 40
dBgainwillbedelivered.
Battery
An alkaline battery is strongly recommended. The battery test
indicator shows the strength of the battery power remaining. A
bright light indicates plenty of power, a dim light reminds you to
be prepared with a fresh battery. Once the LED stops
responding to the test switch, you will begin to hear signal
breakup and distortion as the battery is drained of its last
breath which may mean minutes or hours depending on the
circumstances.

Specifications
Warranty
Input: Balanced XLR female jack, 4000 ohms impedance
-20dBm to +12dBm input range (Consumer / Pro)
Outputs: 1/4" stereo / mono, 8 ohms impedance
1/8" mono, 150 ohms impedance
Frequency Response: 30 Hz - 20 kHz (+ -) 1 dB
The model RemoteAmp is covered by a 2 year warranty to
be free from defective workmanship and materials. In the
event that the RemoteAmp needs repair, you must call us to
get an authorization, and then carefully pack and ship it to us.
You will pay for shipping to us and we will pay for return back
to you, UPS ground. No free repairs will be made if the
defect was caused by misuse, weather conditions, or other
cause, except for defective workmanship or materials.
THERE ARE NO EXPRESS OR IMPLIED WARRANTIES
WHICH EXTEND BEYOND THE WARRANTY HERE MADE.
2/00
JK Audio, Inc.
2701 N. 45th Road, Sandwich, IL 60548 [phone]